class Solution:
    # @param a, a string
    # @param b, a string
    # @return a string
    def addBinary(self, a, b):
    	a = int(a,2)
    	b = int(b,2)
    	z = a + b
    	return bin(z)[2:]

if __name__ == '__main__':
	so = Solution()
	print so.addBinary("11", '1')